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经营范围
发明名称
A TRAVELLING CENTRALIZER ARRANGEMENT IN A ROCK DRILL
摘要
申请公布号
EP0387017(A3)
申请公布日期
1991.07.31
申请号
EP19900302400
申请日期
1990.03.07
申请人
OY TAMPELLA AB
发明人
RAJAKALLIO, PAULI
分类号
E21B19/24;(IPC1-7):E21C9/00
主分类号
E21B19/24
代理机构
代理人
主权项
地址
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